********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 7 April 2016 Vol. XXIX No. 014 ______________________________________________________________________ GENERAL INFORMATION: To receive this information electronically, contact: ser7@maia.usno.navy.mil or use MJD = Julian Date - 2 400 000.5 days UT2-UT1 = 0.022 sin(2*pi*T) - 0.012 cos(2*pi*T) - 0.006 sin(4*pi*T) + 0.007 cos(4*pi*T) where pi = 3.14159265... and T is the date in Besselian years. TT = TAI + 32.184 seconds DUT1= (UT1-UTC) transmitted with time signals = -0.1 seconds beginning 24 Mar 2016 at 0000 UTC Beginning 1 July 2015: TAI-UTC = 36.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should by available by 20:00 UTC. * * * * Distribution statement A. Approved for public release: * * distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ The contributed observations used in the preparation of this Bulletin are available at . The contributed analysis results are based on data from Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), the Global Positioning System (GPS) satellites, Lunar Laser Ranging (LLR), and meteorological predictions of variations in Atmospheric Angular Momentum (AAM). ________________________________________________________________________ COMBINED EARTH ORIENTATION PARAMETERS: IERS Rapid Service MJD x error y error UT1-UTC error " " " " s s 16 4 1 57479 -.00838 .00009 0.42123 .00009 -0.082449 0.000005 16 4 2 57480 -.00805 .00009 0.42268 .00010 -0.084251 0.000006 16 4 3 57481 -.00745 .00009 0.42417 .00009 -0.086159 0.000011 16 4 4 57482 -.00633 .00009 0.42590 .00009 -0.088149 0.000011 16 4 5 57483 -.00464 .00009 0.42784 .00009 -0.090279 0.000012 16 4 6 57484 -.00262 .00009 0.42990 .00009 -0.092500 0.000012 16 4 7 57485 -.00068 .00009 0.43220 .00009 -0.094781 0.000014 IERS Final Values MJD x y UT1-UTC " " s 16 2 2 57420 -0.0048 0.3013 0.02500 16 2 3 57421 -0.0057 0.3026 0.02380 16 2 4 57422 -0.0064 0.3045 0.02263 16 2 5 57423 -0.0075 0.3065 0.02143 16 2 6 57424 -0.0086 0.3081 0.02015 16 2 7 57425 -0.0096 0.3098 0.01873 16 2 8 57426 -0.0096 0.3115 0.01713 16 2 9 57427 -0.0097 0.3132 0.01532 16 2 10 57428 -0.0098 0.3150 0.01331 16 2 11 57429 -0.0105 0.3171 0.01123 16 2 12 57430 -0.0112 0.3190 0.00914 16 2 13 57431 -0.0119 0.3211 0.00714 16 2 14 57432 -0.0124 0.3233 0.00525 16 2 15 57433 -0.0131 0.3254 0.00351 16 2 16 57434 -0.0139 0.3271 0.00191 16 2 17 57435 -0.0147 0.3285 0.00046 16 2 18 57436 -0.0159 0.3304 -0.00086 16 2 19 57437 -0.0174 0.3324 -0.00211 16 2 20 57438 -0.0186 0.3341 -0.00345 16 2 21 57439 -0.0193 0.3355 -0.00488 16 2 22 57440 -0.0199 0.3376 -0.00643 16 2 23 57441 -0.0209 0.3398 -0.00808 16 2 24 57442 -0.0216 0.3421 -0.00979 16 2 25 57443 -0.0219 0.3444 -0.01156 16 2 26 57444 -0.0220 0.3463 -0.01341 16 2 27 57445 -0.0223 0.3484 -0.01522 16 2 28 57446 -0.0232 0.3508 -0.01698 16 2 29 57447 -0.0243 0.3529 -0.01870 16 3 1 57448 -0.0249 0.3545 -0.02037 _______________________________________________________________________ PREDICTIONS: The following formulas will not reproduce the predictions given below, but may be used to extend the predictions beyond the end of this table. x = 0.1127 - 0.1221 cos A + 0.0361 sin A + 0.0072 cos C + 0.0320 sin C y = 0.3659 + 0.0327 cos A + 0.1101 sin A + 0.0320 cos C - 0.0072 sin C UT1-UTC = -0.0852 - 0.00143 (MJD - 57493) - (UT2-UT1) where A = 2*pi*(MJD-57485)/365.25 and C = 2*pi*(MJD-57485)/435. TAI-UTC(MJD 57486) = 36.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57485)**0.80 S t = 0.00025 (MJD-57485)**0.75 Estimated accuracies are: Predictions 10 d 20 d 30 d 40 d Polar coord's 0.004 0.007 0.010 0.013 UT1-UTC 0.0014 0.0024 0.0032 0.0040 MJD x(arcsec) y(arcsec) UT1-UTC(sec) 2016 4 8 57486 0.0010 0.4344 -0.09713 2016 4 9 57487 0.0024 0.4365 -0.09937 2016 4 10 57488 0.0036 0.4383 -0.10142 2016 4 11 57489 0.0049 0.4400 -0.10326 2016 4 12 57490 0.0061 0.4416 -0.10494 2016 4 13 57491 0.0075 0.4431 -0.10648 2016 4 14 57492 0.0089 0.4446 -0.10795 2016 4 15 57493 0.0104 0.4461 -0.10940 2016 4 16 57494 0.0119 0.4476 -0.11089 2016 4 17 57495 0.0135 0.4491 -0.11245 2016 4 18 57496 0.0150 0.4506 -0.11408 2016 4 19 57497 0.0166 0.4520 -0.11576 2016 4 20 57498 0.0181 0.4534 -0.11742 2016 4 21 57499 0.0197 0.4547 -0.11907 2016 4 22 57500 0.0212 0.4559 -0.12071 2016 4 23 57501 0.0229 0.4571 -0.12233 2016 4 24 57502 0.0246 0.4582 -0.12391 2016 4 25 57503 0.0263 0.4593 -0.12544 2016 4 26 57504 0.0280 0.4605 -0.12694 2016 4 27 57505 0.0298 0.4616 -0.12840 2016 4 28 57506 0.0316 0.4627 -0.12988 2016 4 29 57507 0.0334 0.4638 -0.13142 2016 4 30 57508 0.0352 0.4649 -0.13307 2016 5 1 57509 0.0370 0.4659 -0.13486 2016 5 2 57510 0.0389 0.4669 -0.13682 2016 5 3 57511 0.0407 0.4678 -0.13894 2016 5 4 57512 0.0426 0.4688 -0.14118 2016 5 5 57513 0.0445 0.4697 -0.14345 2016 5 6 57514 0.0465 0.4705 -0.14567 2016 5 7 57515 0.0484 0.4714 -0.14776 2016 5 8 57516 0.0503 0.4722 -0.14967 2016 5 9 57517 0.0523 0.4730 -0.15140 2016 5 10 57518 0.0543 0.4738 -0.15299 2016 5 11 57519 0.0563 0.4746 -0.15451 2016 5 12 57520 0.0583 0.4753 -0.15599 2016 5 13 57521 0.0603 0.4760 -0.15746 2016 5 14 57522 0.0623 0.4766 -0.15894 2016 5 15 57523 0.0643 0.4772 -0.16043 2016 5 16 57524 0.0664 0.4778 -0.16192 2016 5 17 57525 0.0684 0.4784 -0.16339 2016 5 18 57526 0.0705 0.4789 -0.16484 2016 5 19 57527 0.0726 0.4794 -0.16622 2016 5 20 57528 0.0747 0.4799 -0.16753 2016 5 21 57529 0.0768 0.4803 -0.16875 2016 5 22 57530 0.0789 0.4807 -0.16986 2016 5 23 57531 0.0810 0.4811 -0.17089 2016 5 24 57532 0.0831 0.4814 -0.17185 2016 5 25 57533 0.0852 0.4817 -0.17280 2016 5 26 57534 0.0874 0.4820 -0.17377 2016 5 27 57535 0.0895 0.4822 -0.17483 2016 5 28 57536 0.0916 0.4824 -0.17601 2016 5 29 57537 0.0938 0.4826 -0.17733 2016 5 30 57538 0.0959 0.4828 -0.17881 2016 5 31 57539 0.0981 0.4829 -0.18041 2016 6 1 57540 0.1002 0.4830 -0.18209 2016 6 2 57541 0.1024 0.4830 -0.18377 2016 6 3 57542 0.1046 0.4830 -0.18538 2016 6 4 57543 0.1067 0.4830 -0.18685 2016 6 5 57544 0.1089 0.4830 -0.18817 2016 6 6 57545 0.1110 0.4829 -0.18937 2016 6 7 57546 0.1132 0.4828 -0.19048 2016 6 8 57547 0.1153 0.4826 -0.19157 2016 6 9 57548 0.1175 0.4824 -0.19266 2016 6 10 57549 0.1196 0.4822 -0.19377 2016 6 11 57550 0.1218 0.4820 -0.19490 2016 6 12 57551 0.1239 0.4817 -0.19604 2016 6 13 57552 0.1261 0.4814 -0.19718 2016 6 14 57553 0.1282 0.4811 -0.19828 2016 6 15 57554 0.1303 0.4807 -0.19932 2016 6 16 57555 0.1324 0.4803 -0.20029 2016 6 17 57556 0.1345 0.4798 -0.20116 2016 6 18 57557 0.1366 0.4794 -0.20195 2016 6 19 57558 0.1387 0.4789 -0.20266 2016 6 20 57559 0.1408 0.4783 -0.20330 2016 6 21 57560 0.1429 0.4778 -0.20391 2016 6 22 57561 0.1450 0.4772 -0.20453 2016 6 23 57562 0.1470 0.4766 -0.20521 2016 6 24 57563 0.1490 0.4759 -0.20598 2016 6 25 57564 0.1511 0.4752 -0.20687 2016 6 26 57565 0.1531 0.4745 -0.20789 2016 6 27 57566 0.1551 0.4738 -0.20900 2016 6 28 57567 0.1571 0.4730 -0.21017 2016 6 29 57568 0.1591 0.4722 -0.21133 2016 6 30 57569 0.1610 0.4713 -0.21243 2016 7 1 57570 0.1630 0.4705 -0.21341 2016 7 2 57571 0.1649 0.4696 -0.21424 2016 7 3 57572 0.1668 0.4686 -0.21493 2016 7 4 57573 0.1687 0.4677 -0.21553 2016 7 5 57574 0.1706 0.4667 -0.21608 2016 7 6 57575 0.1725 0.4657 -0.21665 2016 7 7 57576 0.1743 0.4646 -0.21724 2016 7 8 57577 0.1762 0.4636 -0.21788 2016 7 9 57578 0.1780 0.4625 -0.21855 2016 7 10 57579 0.1798 0.4613 -0.21923 2016 7 11 57580 0.1815 0.4602 -0.21990 2016 7 12 57581 0.1833 0.4590 -0.22053 2016 7 13 57582 0.1850 0.4578 -0.22110 2016 7 14 57583 0.1867 0.4566 -0.22160 2016 7 15 57584 0.1884 0.4553 -0.22202 2016 7 16 57585 0.1900 0.4540 -0.22236 2016 7 17 57586 0.1917 0.4527 -0.22265 2016 7 18 57587 0.1933 0.4514 -0.22291 2016 7 19 57588 0.1949 0.4500 -0.22319 2016 7 20 57589 0.1964 0.4487 -0.22353 2016 7 21 57590 0.1980 0.4472 -0.22398 2016 7 22 57591 0.1995 0.4458 -0.22457 2016 7 23 57592 0.2010 0.4444 -0.22531 2016 7 24 57593 0.2024 0.4429 -0.22618 2016 7 25 57594 0.2039 0.4414 -0.22715 2016 7 26 57595 0.2053 0.4399 -0.22814 2016 7 27 57596 0.2067 0.4383 -0.22908 2016 7 28 57597 0.2080 0.4368 -0.22993 2016 7 29 57598 0.2093 0.4352 -0.23065 2016 7 30 57599 0.2106 0.4336 -0.23126 2016 7 31 57600 0.2119 0.4320 -0.23179 2016 8 1 57601 0.2131 0.4303 -0.23228 2016 8 2 57602 0.2143 0.4287 -0.23280 2016 8 3 57603 0.2155 0.4270 -0.23337 2016 8 4 57604 0.2167 0.4253 -0.23402 2016 8 5 57605 0.2178 0.4236 -0.23473 2016 8 6 57606 0.2189 0.4219 -0.23549 2016 8 7 57607 0.2199 0.4201 -0.23626 2016 8 8 57608 0.2209 0.4183 -0.23702 2016 8 9 57609 0.2219 0.4166 -0.23774 2016 8 10 57610 0.2229 0.4148 -0.23841 2016 8 11 57611 0.2238 0.4130 -0.23901 2016 8 12 57612 0.2247 0.4112 -0.23954 2016 8 13 57613 0.2256 0.4093 -0.24003 2016 8 14 57614 0.2264 0.4075 -0.24050 2016 8 15 57615 0.2272 0.4056 -0.24099 2016 8 16 57616 0.2279 0.4037 -0.24155 2016 8 17 57617 0.2287 0.4019 -0.24223 2016 8 18 57618 0.2294 0.4000 -0.24306 2016 8 19 57619 0.2300 0.3981 -0.24408 2016 8 20 57620 0.2306 0.3961 -0.24527 2016 8 21 57621 0.2312 0.3942 -0.24659 2016 8 22 57622 0.2318 0.3923 -0.24795 2016 8 23 57623 0.2323 0.3903 -0.24928 2016 8 24 57624 0.2328 0.3884 -0.25051 2016 8 25 57625 0.2332 0.3864 -0.25162 2016 8 26 57626 0.2337 0.3845 -0.25260 2016 8 27 57627 0.2340 0.3825 -0.25349 2016 8 28 57628 0.2344 0.3805 -0.25435 2016 8 29 57629 0.2347 0.3786 -0.25521 2016 8 30 57630 0.2350 0.3766 -0.25613 2016 8 31 57631 0.2352 0.3746 -0.25714 2016 9 1 57632 0.2354 0.3726 -0.25823 2016 9 2 57633 0.2356 0.3706 -0.25939 2016 9 3 57634 0.2357 0.3686 -0.26058 2016 9 4 57635 0.2358 0.3666 -0.26178 2016 9 5 57636 0.2358 0.3646 -0.26296 2016 9 6 57637 0.2358 0.3626 -0.26409 2016 9 7 57638 0.2358 0.3606 -0.26516 2016 9 8 57639 0.2358 0.3586 -0.26617 2016 9 9 57640 0.2357 0.3566 -0.26714 2016 9 10 57641 0.2356 0.3546 -0.26807 2016 9 11 57642 0.2354 0.3526 -0.26902 2016 9 12 57643 0.2352 0.3506 -0.27001 2016 9 13 57644 0.2350 0.3486 -0.27112 2016 9 14 57645 0.2347 0.3466 -0.27237 2016 9 15 57646 0.2344 0.3446 -0.27382 2016 9 16 57647 0.2340 0.3426 -0.27547 2016 9 17 57648 0.2337 0.3407 -0.27729 2016 9 18 57649 0.2333 0.3387 -0.27921 2016 9 19 57650 0.2328 0.3367 -0.28114 2016 9 20 57651 0.2323 0.3348 -0.28300 2016 9 21 57652 0.2318 0.3328 -0.28471 2016 9 22 57653 0.2313 0.3309 -0.28629 2016 9 23 57654 0.2307 0.3290 -0.28774 2016 9 24 57655 0.2300 0.3270 -0.28912 2016 9 25 57656 0.2294 0.3251 -0.29049 2016 9 26 57657 0.2287 0.3232 -0.29189 2016 9 27 57658 0.2280 0.3213 -0.29337 2016 9 28 57659 0.2272 0.3194 -0.29492 2016 9 29 57660 0.2264 0.3176 -0.29654 2016 9 30 57661 0.2256 0.3157 -0.29821 2016 10 1 57662 0.2247 0.3139 -0.29989 2016 10 2 57663 0.2238 0.3120 -0.30156 2016 10 3 57664 0.2229 0.3102 -0.30319 2016 10 4 57665 0.2219 0.3084 -0.30475 2016 10 5 57666 0.2209 0.3066 -0.30625 2016 10 6 57667 0.2199 0.3049 -0.30767 2016 10 7 57668 0.2189 0.3031 -0.30904 2016 10 8 57669 0.2178 0.3013 -0.31038 2016 10 9 57670 0.2167 0.2996 -0.31174 2016 10 10 57671 0.2155 0.2979 -0.31315 2016 10 11 57672 0.2143 0.2962 -0.31466 2016 10 12 57673 0.2131 0.2945 -0.31629 2016 10 13 57674 0.2119 0.2929 -0.31808 2016 10 14 57675 0.2106 0.2913 -0.32001 2016 10 15 57676 0.2093 0.2896 -0.32205 2016 10 16 57677 0.2080 0.2880 -0.32411 2016 10 17 57678 0.2066 0.2865 -0.32612 2016 10 18 57679 0.2052 0.2849 -0.32801 2016 10 19 57680 0.2038 0.2834 -0.32976 2016 10 20 57681 0.2024 0.2819 -0.33136 2016 10 21 57682 0.2009 0.2804 -0.33289 2016 10 22 57683 0.1994 0.2789 -0.33438 2016 10 23 57684 0.1979 0.2774 -0.33590 2016 10 24 57685 0.1963 0.2760 -0.33747 2016 10 25 57686 0.1948 0.2746 -0.33911 2016 10 26 57687 0.1932 0.2732 -0.34080 2016 10 27 57688 0.1916 0.2719 -0.34252 2016 10 28 57689 0.1899 0.2706 -0.34425 2016 10 29 57690 0.1882 0.2693 -0.34595 2016 10 30 57691 0.1865 0.2680 -0.34760 2016 10 31 57692 0.1848 0.2667 -0.34919 2016 11 1 57693 0.1831 0.2655 -0.35071 2016 11 2 57694 0.1813 0.2643 -0.35217 2016 11 3 57695 0.1796 0.2631 -0.35358 2016 11 4 57696 0.1778 0.2620 -0.35498 2016 11 5 57697 0.1759 0.2609 -0.35638 2016 11 6 57698 0.1741 0.2598 -0.35784 2016 11 7 57699 0.1722 0.2587 -0.35939 2016 11 8 57700 0.1704 0.2577 -0.36108 2016 11 9 57701 0.1685 0.2567 -0.36293 2016 11 10 57702 0.1666 0.2557 -0.36495 2016 11 11 57703 0.1646 0.2548 -0.36710 2016 11 12 57704 0.1627 0.2538 -0.36933 2016 11 13 57705 0.1607 0.2530 -0.37159 2016 11 14 57706 0.1587 0.2521 -0.37381 2016 11 15 57707 0.1567 0.2513 -0.37590 2016 11 16 57708 0.1547 0.2505 -0.37785 2016 11 17 57709 0.1527 0.2497 -0.37969 2016 11 18 57710 0.1507 0.2490 -0.38138 2016 11 19 57711 0.1486 0.2483 -0.38300 2016 11 20 57712 0.1466 0.2476 -0.38471 2016 11 21 57713 0.1445 0.2470 -0.38652 2016 11 22 57714 0.1424 0.2463 -0.38839 2016 11 23 57715 0.1403 0.2458 -0.39033 2016 11 24 57716 0.1382 0.2452 -0.39229 2016 11 25 57717 0.1361 0.2447 -0.39423 2016 11 26 57718 0.1340 0.2442 -0.39613 2016 11 27 57719 0.1319 0.2438 -0.39800 2016 11 28 57720 0.1297 0.2433 -0.39974 2016 11 29 57721 0.1276 0.2430 -0.40136 2016 11 30 57722 0.1254 0.2426 -0.40286 2016 12 1 57723 0.1233 0.2423 -0.40421 2016 12 2 57724 0.1211 0.2420 -0.40552 2016 12 3 57725 0.1190 0.2417 -0.40685 2016 12 4 57726 0.1168 0.2415 -0.40825 2016 12 5 57727 0.1146 0.2413 -0.40979 2016 12 6 57728 0.1124 0.2412 -0.41143 2016 12 7 57729 0.1103 0.2410 -0.41318 2016 12 8 57730 0.1081 0.2410 -0.41509 2016 12 9 57731 0.1059 0.2409 -0.41712 2016 12 10 57732 0.1037 0.2409 -0.41919 2016 12 11 57733 0.1016 0.2409 -0.42119 2016 12 12 57734 0.0994 0.2409 -0.42307 2016 12 13 57735 0.0972 0.2410 -0.42487 2016 12 14 57736 0.0950 0.2411 -0.42657 2016 12 15 57737 0.0929 0.2413 -0.42820 2016 12 16 57738 0.0907 0.2414 -0.42980 2016 12 17 57739 0.0885 0.2416 -0.43146 2016 12 18 57740 0.0864 0.2419 -0.43310 2016 12 19 57741 0.0842 0.2421 -0.43481 2016 12 20 57742 0.0821 0.2425 -0.43653 2016 12 21 57743 0.0799 0.2428 -0.43825 2016 12 22 57744 0.0778 0.2432 -0.43999 2016 12 23 57745 0.0757 0.2436 -0.44165 2016 12 24 57746 0.0735 0.2440 -0.44322 2016 12 25 57747 0.0714 0.2445 -0.44476 2016 12 26 57748 0.0693 0.2450 -0.44613 2016 12 27 57749 0.0672 0.2455 -0.44741 2016 12 28 57750 0.0652 0.2461 -0.44861 2016 12 29 57751 0.0631 0.2467 -0.44976 2016 12 30 57752 0.0610 0.2473 -0.45089 2016 12 31 57753 0.0590 0.2479 -0.45204 2017 1 1 57754 0.0569 0.2486 -0.45326 2017 1 2 57755 0.0549 0.2494 -0.45454 2017 1 3 57756 0.0529 0.2501 -0.45603 2017 1 4 57757 0.0509 0.2509 -0.45763 2017 1 5 57758 0.0490 0.2517 -0.45930 2017 1 6 57759 0.0470 0.2525 -0.46109 2017 1 7 57760 0.0450 0.2534 -0.46278 2017 1 8 57761 0.0431 0.2543 -0.46449 2017 1 9 57762 0.0412 0.2552 -0.46609 2017 1 10 57763 0.0393 0.2562 -0.46759 2017 1 11 57764 0.0374 0.2572 -0.46896 2017 1 12 57765 0.0356 0.2582 -0.47034 2017 1 13 57766 0.0337 0.2593 -0.47178 2017 1 14 57767 0.0319 0.2603 -0.47331 2017 1 15 57768 0.0301 0.2614 -0.47489 2017 1 16 57769 0.0283 0.2626 -0.47658 2017 1 17 57770 0.0266 0.2637 -0.47832 2017 1 18 57771 0.0248 0.2649 -0.48016 2017 1 19 57772 0.0231 0.2661 -0.48204 2017 1 20 57773 0.0214 0.2673 -0.48390 2017 1 21 57774 0.0198 0.2686 -0.48565 2017 1 22 57775 0.0181 0.2699 -0.48725 2017 1 23 57776 0.0165 0.2712 -0.48883 2017 1 24 57777 0.0149 0.2725 -0.49024 2017 1 25 57778 0.0133 0.2739 -0.49166 2017 1 26 57779 0.0118 0.2753 -0.49301 2017 1 27 57780 0.0103 0.2767 -0.49435 2017 1 28 57781 0.0088 0.2781 -0.49573 2017 1 29 57782 0.0073 0.2796 -0.49724 2017 1 30 57783 0.0059 0.2810 -0.49891 2017 1 31 57784 0.0045 0.2825 -0.50075 2017 2 1 57785 0.0031 0.2840 -0.50274 2017 2 2 57786 0.0017 0.2856 -0.50482 2017 2 3 57787 0.0004 0.2871 -0.50687 2017 2 4 57788 -0.0009 0.2887 -0.50880 2017 2 5 57789 -0.0022 0.2903 -0.51059 2017 2 6 57790 -0.0034 0.2919 -0.51222 2017 2 7 57791 -0.0046 0.2936 -0.51364 2017 2 8 57792 -0.0058 0.2952 -0.51503 2017 2 9 57793 -0.0070 0.2969 -0.51638 2017 2 10 57794 -0.0081 0.2986 -0.51770 2017 2 11 57795 -0.0092 0.3003 -0.51902 2017 2 12 57796 -0.0102 0.3020 -0.52034 2017 2 13 57797 -0.0113 0.3037 -0.52166 2017 2 14 57798 -0.0123 0.3055 -0.52310 2017 2 15 57799 -0.0132 0.3073 -0.52441 2017 2 16 57800 -0.0141 0.3091 -0.52571 2017 2 17 57801 -0.0150 0.3109 -0.52699 2017 2 18 57802 -0.0159 0.3127 -0.52819 2017 2 19 57803 -0.0167 0.3145 -0.52932 2017 2 20 57804 -0.0175 0.3163 -0.53040 2017 2 21 57805 -0.0183 0.3182 -0.53156 2017 2 22 57806 -0.0190 0.3200 -0.53274 2017 2 23 57807 -0.0197 0.3219 -0.53391 2017 2 24 57808 -0.0204 0.3238 -0.53516 2017 2 25 57809 -0.0210 0.3257 -0.53651 2017 2 26 57810 -0.0216 0.3276 -0.53804 2017 2 27 57811 -0.0222 0.3295 -0.53968 2017 2 28 57812 -0.0227 0.3314 -0.54148 2017 3 1 57813 -0.0232 0.3333 -0.54336 2017 3 2 57814 -0.0236 0.3353 -0.54530 2017 3 3 57815 -0.0241 0.3372 -0.54718 2017 3 4 57816 -0.0244 0.3392 -0.54901 2017 3 5 57817 -0.0248 0.3411 -0.55067 2017 3 6 57818 -0.0251 0.3431 -0.55229 2017 3 7 57819 -0.0254 0.3450 -0.55381 2017 3 8 57820 -0.0256 0.3470 -0.55537 2017 3 9 57821 -0.0258 0.3490 -0.55700 2017 3 10 57822 -0.0260 0.3509 -0.55881 2017 3 11 57823 -0.0261 0.3529 -0.56072 2017 3 12 57824 -0.0262 0.3549 -0.56278 2017 3 13 57825 -0.0263 0.3569 -0.56488 2017 3 14 57826 -0.0263 0.3588 -0.56695 2017 3 15 57827 -0.0263 0.3608 -0.56895 2017 3 16 57828 -0.0263 0.3628 -0.57088 2017 3 17 57829 -0.0262 0.3648 -0.57269 2017 3 18 57830 -0.0261 0.3667 -0.57436 2017 3 19 57831 -0.0259 0.3687 -0.57596 2017 3 20 57832 -0.0257 0.3707 -0.57747 2017 3 21 57833 -0.0255 0.3727 -0.57891 2017 3 22 57834 -0.0252 0.3746 -0.58028 2017 3 23 57835 -0.0250 0.3766 -0.58167 2017 3 24 57836 -0.0246 0.3785 -0.58310 2017 3 25 57837 -0.0243 0.3805 -0.58466 2017 3 26 57838 -0.0239 0.3824 -0.58631 2017 3 27 57839 -0.0234 0.3844 -0.58808 2017 3 28 57840 -0.0230 0.3863 -0.59000 2017 3 29 57841 -0.0225 0.3882 -0.59199 2017 3 30 57842 -0.0219 0.3901 -0.59395 2017 3 31 57843 -0.0213 0.3920 -0.59587 2017 4 1 57844 -0.0207 0.3939 -0.59767 2017 4 2 57845 -0.0201 0.3958 -0.59930 2017 4 3 57846 -0.0194 0.3977 -0.60084 2017 4 4 57847 -0.0187 0.3996 -0.60231 2017 4 5 57848 -0.0180 0.4014 -0.60375 2017 4 6 57849 -0.0172 0.4033 -0.60521 2017 4 7 57850 -0.0164 0.4051 -0.60663 These predictions are based on all announced leap seconds. CELESTIAL POLE OFFSET SERIES: NEOS Celestial Pole Offset Series MJD dpsi error deps error (msec. of arc) 57463 -93.29 0.30 -12.18 0.15 57464 -93.10 0.30 -12.29 0.15 57465 -92.98 0.30 -12.33 0.15 57466 -92.85 0.30 -12.35 0.15 57467 -92.67 0.24 -12.40 0.13 57468 -92.52 0.24 -12.43 0.13 57469 -92.43 0.24 -12.39 0.13 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57420 -94.7 -10.2 57421 -94.8 -10.1 57422 -94.7 -9.9 57423 -94.6 -9.8 57424 -94.5 -9.9 57425 -94.5 -10.2 57426 -94.4 -10.5 57427 -94.1 -10.4 57428 -93.9 -10.0 57429 -93.8 -9.8 57430 -93.9 -9.8 57431 -94.2 -10.0 57432 -94.4 -10.2 57433 -94.5 -10.4 57434 -94.6 -10.5 57435 -94.7 -10.5 57436 -94.6 -10.6 57437 -94.4 -10.7 57438 -94.2 -10.7 57439 -94.0 -10.7 57440 -94.0 -10.8 57441 -94.0 -10.9 57442 -93.9 -11.0 57443 -93.8 -11.2 57444 -93.9 -11.3 57445 -94.1 -11.4 57446 -94.2 -11.6 57447 -94.4 -11.7 57448 -94.5 -11.8 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57463 0.015 0.119 0.038 0.150 57464 0.027 0.119 0.032 0.150 57465 0.049 0.119 0.018 0.150 57466 0.064 0.119 0.008 0.150 57467 0.068 0.095 -0.004 0.130 57468 0.056 0.095 -0.007 0.130 57469 0.042 0.095 -0.006 0.130 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57420 -0.13 -0.13 57421 -0.15 -0.17 57422 -0.13 -0.17 57423 -0.14 -0.18 57424 -0.15 -0.14 57425 -0.16 -0.15 57426 -0.16 -0.25 57427 -0.14 -0.23 57428 -0.18 -0.12 57429 -0.19 -0.15 57430 -0.20 -0.14 57431 -0.22 -0.16 57432 -0.21 -0.15 57433 -0.20 -0.19 57434 -0.20 -0.14 57435 -0.21 -0.01 57436 -0.18 -0.01 57437 -0.17 -0.08 57438 -0.17 -0.09 57439 -0.15 -0.07 57440 -0.16 -0.11 57441 -0.17 -0.12 57442 -0.16 -0.10 57443 -0.13 -0.18 57444 -0.13 -0.15 57445 -0.14 -0.14 57446 -0.11 -0.22 57447 -0.13 -0.20 57448 -0.12 -0.22 The recommended software to predict celestial pole offsets can be found at and software for the calculation of the dX and dY components with respect to IAU2000A Nutation/Precession Theory can be found at the web site in Chapter 5 Section 5.5 of the IERS Conventions (2010).